I had this problem tonight while tanking the new boss in BH 10, and it happened both times within a few seconds of the pull (causing 2 wipes and group fell apart). After googling the problem and finding the solution elsewhere, I thought I'd post here. Much like Xye, my problems went away after unchecking all the boxes in the Privacy and Communications tab in the options menu.

Other than this issue, I've had very few problems with Carbonite. Love the addon and will continue using it. Thanks guys!